Answer:
HEART
Explanation:
The heart is the key organ in the circulatory system. As a hollow, muscular pump, its main function is to propel blood throughout the body. And its job is to pump blood throughout your circulatory system.
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Answers & Comments
Answer:
HEART
Explanation:
The heart is the key organ in the circulatory system. As a hollow, muscular pump, its main function is to propel blood throughout the body. And its job is to pump blood throughout your circulatory system.